wednesday, march 4, 2009 objective: students will be able to identify the types of fossils and how...
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Wednesday, March 4, 2009
Objective: Students will be able to identify the types of fossils and how they are formed.
Bellringer: Name 2 types of fossils & how they were formed.
Wednesday, March 4, 2009
Objective: Students will be able to identify the types of fossils and how they are formed.
Bellringer: Name 2 types of fossils & how they were formed.
Wednesday, March 4, 2009 last chance to view BR - 1 min
Objective: Students will be able to identify the types of fossils and how they are formed.
Bellringer: Name 2 types of fossils & how they were formed.
March 4, 2009
AGENDA:
1 – Bellringer
2 – Review homework
3 - Powerpoint Presentation
4 – Review Key Topics
HOMEWORK (Quiz tomorrow! You can use your notes):
Quiz is on Section 15.1
~ Cornell Notes
~ Vocabulary
VOCABULARY REVIEW1. Fossil2. Plate Tectonics3. Paleontologist4. Relative dating5. Radiometric
dating6. Extinct7. Geologic Time
Scale8. Pangaea9. Continent10.Country
A. Theory that explains how continents move
B. Estimated date based on location of fossil
C. Entire species died offD. The original “super continent”E. Evidence of organism that lived a
long time agoF. landmassG. Political regimeH. Puts palenotological events in
orderI. Dating process using isotopesJ. One who studies ancient
organisms
Continental Drift & Plate Tectonics
• Early 20th century: continents moved about the face of the Earth (Wegner used fossil evidence)
• Contradicted established views that the continents and oceans were permanent stationary features on the face of the Earth
• Current theory: Earth’s crust is broken into numerous plates that are in continual motion
7 Continents
1. Antarctica
2. Australia
3. Africa
4. Asia
5. Europe
6. North America
7. South America
Ways to become Fossilized:1. Permineralization & Petrification – organic tissues
are replaced with minerals from the surrounding rock, including silica, calcite or pyrite.
2. Unaltered preservation - organism is preserved in its original state (example: trapped in tree sap)
3. Carbonization (Coalification) - removal of all but the carbon elements (hydrogen, oxygen, and nitrogen are removed)
4. Trace & Molds - These fossils are the molds and casts of organisms which have dissolved or rotted away, leaving only a trace of their existence.
Fossilization Process
1. Death
2. Minerals from sediment seep into bone
3. Sediment covers body
4. More sediment covers & pressure compresses fossil
5. Extraction (fossil “discovered”)
Pasteurization
• His research proved biogenesis
Process: liquid is heated to kill off microbes
~ milk
~ juice
~ cheese